U.S. patent number 7,855,165 [Application Number 11/622,514] was granted by the patent office on 2010-12-21 for herbicide composition for paddy field.
This patent grant is currently assigned to Bayer Cropscience AG. Invention is credited to Keiji Endo, Natsuko Minegishi, Shin Nakamura, Shinichi Shirakura.
United States Patent |
7,855,165 |
Endo , et al. |
December 21, 2010 |
Herbicide composition for paddy field
Abstract
A herbicide composition for paddy field characterized by
containing (a) a herbicidal difluoromethanesulfonamide derivative
represented by the formula (I) ##STR00001## and (b) at least one
herbicidal compound selected from the group consisting of
pretilachlor, butachlor, alachlor, metolachlor, acetochlor,
clomeprop, bromobutide, benfuresate, indanofan, pyrazolate,
benzofenap, pyrazoxyfen, pyraclonil, oxaziclomefone,
bensulfuron-methyl, azimsulfuron, imazosulfuron,
pyrazosulfuron-ethyl, cyclosulfamuron, ethoxysulfuron,
halosulfuron-methyl, orthosulfamuron, cinosulfuron,
metsulfuron-methyl, penoxsulam, thiobencarb, pyributycarb,
molinate, dimethametryn, simetryn, cafenstrole, quinclorac,
anilofos, mefenacet, fentrazamide, pentoxazone, oxadiargyl,
oxadiazon, benzobicyclon, mesotrione, AVH301 (code no.),
cyhalofop-butyl, metamifop, bispyribac-sodium, pyriftalid,
pyrimisulfan, pyrimenobac-methyl, chlormethoxynil, oxyfluorfen,
dithiopyr, MCPA, MCPB, 2,4-D, dymron, cumyluron, quinoclamine and
clomazone, and/or (c) one or more compounds selected from the group
consisting of safeners dymron, isoxadifen(-ethyl), flurazole,
fenchlorazole-ethyl, fenclorim, cloquintocet-mexyl, oxabetrinil,
fluxofenim, mefenpyr-diethyl, furilazole, R-29148 (code no.),
benoxacor, dichlormid and dicyclonone as effective components.
Inventors: |
Endo; Keiji (Ibaraki,
JP), Shirakura; Shinichi (Tochigi, JP),
Nakamura; Shin (Tochigi, JP), Minegishi; Natsuko
(Tochigi, JP) |
Assignee: |
Bayer Cropscience AG
(DE)
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Family
ID: |
38134900 |
Appl.
No.: |
11/622,514 |
Filed: |
January 12, 2007 |
Prior Publication Data
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Document
Identifier |
Publication Date |
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US 20070167328 A1 |
Jul 19, 2007 |
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Current U.S.
Class: |
504/134;
504/136 |
Current CPC
Class: |
A01N
43/66 (20130101); A01N 43/54 (20130101); A01N
43/54 (20130101); A01N 25/32 (20130101); A01N
37/18 (20130101); A01N 37/22 (20130101); A01N
39/02 (20130101); A01N 43/08 (20130101); A01N
43/12 (20130101); A01N 43/54 (20130101); A01N
43/56 (20130101); A01N 43/78 (20130101); A01N
43/80 (20130101); A01N 43/86 (20130101); A01N
43/90 (20130101); A01N 47/30 (20130101); A01N
47/36 (20130101); A01N 47/38 (20130101); A01N
57/14 (20130101); A01N 43/66 (20130101); A01N
25/32 (20130101); A01N 37/18 (20130101); A01N
37/22 (20130101); A01N 39/02 (20130101); A01N
43/08 (20130101); A01N 43/12 (20130101); A01N
43/54 (20130101); A01N 43/56 (20130101); A01N
43/78 (20130101); A01N 43/80 (20130101); A01N
43/86 (20130101); A01N 43/90 (20130101); A01N
47/30 (20130101); A01N 47/36 (20130101); A01N
47/38 (20130101); A01N 57/14 (20130101); A01N
43/54 (20130101); A01N 2300/00 (20130101); A01N
43/66 (20130101); A01N 2300/00 (20130101) |
Current International
Class: |
A01N
43/64 (20060101); A01N 43/60 (20060101) |
Foreign Patent Documents
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WO 2005/096818 |
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Oct 2005 |
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WO |
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WO-2005096818 |
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Oct 2005 |
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WO |
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Primary Examiner: Pryor; Alton N
Attorney, Agent or Firm: Frommer Lawrence & Haug LLP
Claims
The invention claimed is:
1. A herbicide composition for a paddy field characterized by
comprising a synergistic combination of components (a) and (b),
wherein (a) is one or more difluoromethanesulfonamide derivatives
represented by the formula (I), ##STR00004## wherein X represents
fluorine, Y represents CH or N, R.sup.1 represents hydrogen, and
R.sup.2 represents hydroxy, and (b) is ethoxysulfuron.
2. A composition according to claim 1, characterized in that Y
represents N.
3. A composition according to claim 1, characterized in that Y
represents CH.
4. A composition according to claim 1, characterized in that it
comprises compound (b) in the range of 0.05-200 parts by weight to
1 part by weight of the compound (a).
5. A composition as claimed in claim 2, characterized in that it
comprises compound (b) in the range of 0.05-200 parts by weight to
1 part by weight of the compound (a).
6. A composition as claimed in claim 3, characterized in that it
comprises compound (b) in the range of 0.05-200 parts by weight to
1 part by weight of the compound (a).
7. Method for controlling weeds in a paddy field which comprises
applying to the weeds, parts of the weeds, weed seeds or their
habitat, optionally in the presence of a crop, the herbicidal
composition of claim 1 wherein the components (a) and (b) are
applied simultaneously or sequentially, and wherein the components
are defined as in claim 1.
8. Method as claimed in claim 7, characterized in that Y represents
or N.
9. Method as claimed in claim 7, characterized in that Y represents
CH.
10. Method as claimed in claim 7, wherein the crop is rice.
11. Method according to claim 7, characterized in that it comprises
compound (b) in the range of 0.05-200 parts by weight to 1 part by
weight of the compound (a).
12. Method according to claim 8, characterized in that it comprises
compound (b) in the range of 0.05-200 parts by weight to 1 part by
weight of the compound (a).
13. Method according to claim 9, characterized in that it comprises
compound (b) in the range of 0.05-200 parts by weight to 1 part by
weight of the compound (a).
Description
INCORPORATION BY REFERENCE
This application claims benefit under 35 U.S.C. 119(a) of Japanese
patent application 2006-6422, filed on 13 Jan. 2006.
Any foregoing applications, including Japanese patent application
2006-6422, and all documents cited therein or during their
prosecution ("application cited documents") and all documents cited
or referenced in the application cited documents, and all documents
cited or referenced herein ("herein cited documents"), and all
documents cited or referenced in herein cited documents, together
with any manufacturer's instructions, descriptions, product
specifications, and product sheets for any products mentioned
herein or in any document incorporated by reference herein, are
hereby incorporated herein by reference, and may be employed in the
practice of the invention.
The present invention relates to a herbicide composition for a
paddy field. More specifically the present invention relates to a
herbicide composition for a paddy field containing a herbicidal
difluoromethanesulfonamide derivative and a certain kind of known
herbicidal compound as effective components.
Difluoromethanesulfonamide (DFMS) derivatives represented by the
formula
##STR00002## wherein X represents a halogen, Y represents CH or N,
R.sup.1 represents hydrogen, and R.sup.2 represents hydrogen or
hydroxy, or R.sup.1 and R.sup.2 together may form C.dbd.O with the
carbon atom to which they are bonding, are known compounds
(WO-A-2005/096818). Some of these derivatives show good controlling
effect against paddy field weeds. However, contrary to expectation,
some DFMS compounds do not show a fully satisfactory herbicidal
effect and phytotoxicity to paddy rice is observed. In practical
usage, it is difficult to provide a single active compound with
such properties as to correspond to various kinds of usage, as
there are many potential elements influencing the herbicidal
effect. Examples of such elements include the kinds of weeds to be
controlled, the conditions of their developing area, etc., and as
such the effect of an active compound is different. In addition,
with regard to considerations of cost reduction in agricultural
production, effects on the environment, etc., development of an
agent showing effective action with less application amount is also
a desired goal.
The invention does not intend to encompass within the scope of the
invention any previously disclosed product, process of making the
product or method of using the product, which meets the written
description and enablement requirements of the USPTO (35 U.S.C.
112, first paragraph) or the EPO (Article 83 of the EPC), such that
applicant(s) reserve the right and hereby disclose a disclaimer of
any previously described product, method of making the product or
process of using the product.
It is noted that in this disclosure and particularly in the claims
and/or paragraphs, terms such as "comprises", "comprised",
"comprising" and the like can have the meaning attributed to it in
U.S. Patent law; e.g., they can mean "includes", "included",
"including", and the like; and that terms such as "consisting
essentially of" and "consists essentially of" have the meaning
ascribed to them in U.S. Patent law, e.g., they allow for elements
not explicitly recited, but exclude elements that are found in the
prior art or that affect a basic or novel characteristic of the
invention.
These and other embodiments are disclosed or are apparent from and
encompassed by, the following Detailed Description.
In order to fulfill the desired goal(s), one of the methods to
improve properties of a herbicide is to mix it with other active
compounds. However, the expected effect of such mixtures is not
necessarily obtained due to factors such as decomposition of active
compounds, antagonistic action of effects, etc.
The present inventors have found that the composition mentioned
below shows an excellent and desirable effect in terms of weed
controlling in paddy field and lowering phytotoxicity to rice.
Thus, the present invention provides a herbicide composition for a
paddy field comprising a combination of components (a), (b) and/or
(c), wherein (a) is one or more difluoromethanesulfonamide
derivative compounds represented by the formula
##STR00003## wherein X represents a halogen, Y represents CH or N,
R.sup.1 represents hydrogen, and R.sup.2 represents hydrogen or
hydroxy, or R.sup.1 and R.sup.2 together may form C.dbd.O with the
carbon atom to which they are bonding, (b) is one or more
herbicidal compounds selected from the group consisting of
pretilachlor, butachlor, alachlor, metolachlor, acetochlor,
clomeprop, bromobutide, benfuresate, indanofan, pyrazolate,
benzofenap, pyrazoxyfen, pyraclonil, oxaziclomefone,
bensulfuron-methyl, azimsulfuron, imazosulfuron,
pyrazosulfuron-ethyl, cyclosulfamuron, ethoxysulfuron,
halosulfuron-methyl, orthosulfamuron, cinosulfuron,
metsulfuron-methyl, penoxsulam, thiobencarb, pyributycarb,
molinate, dimethametryn, simetryn, cafenstrole, quinclorac,
anilofos, mefenacet, fentrazamide, pentoxazone, oxadiargyl,
oxadiazon, benzobicyclon, mesotrione, AVH301 (code no.),
cyhalofop-butyl, metamifop, bispyribac-sodium, pyriftalid,
pyrimisulfan, pyrimenobac-methyl, chlormethoxynil (chlomethoxyfen),
oxyfluorfen, dithiopyr, MCPA, MCPB, 2,4-D, dymron, cumyluron,
quinoclamine and clomazone, and (c) is one or more safener
compounds selected from the group consisting of dymron,
isoxadifen(-ethyl), flurazole, fenchlorazole-ethyl, fenclorim,
cloquintocet-mexyl, oxabetrinil, fluxofenim, mefenpyr-diethyl,
furilazole, R-29148 (code no.), benoxacor, dichlormid and
dicyclonone as effective components.
In the following the compounds of components (a), (b) and (c) are
also named compounds (a), (b) or (c), respectively. The components
(a), (b) and (c) are also shortly named compound (a), (b) or (c)
respectively.
Surprisingly, the composition of the present invention, provides a
substantially higher herbicidal effect (synergistic effect) than
the sum of the effect of each active compound applied individually.
As a result, for controlling weeds, it is possible to substantially
reduce the concentration of each compound as used previously in the
art. At the same time for the composition of the invention, a broad
herbicidal spectrum can be obtained and the application period can
be increased. In the paddy rice culture, for example, the
compositions of the invention show excellent herbicidal effect when
applied any time from the early stage of weed development just
after the transplantation to growing period. In addition, the
effects are maintained for a long period Thus, an excellent
herbicidal effect with an excellent residual effect and no
phytotoxicity to rice is obtained.
In one embodiment of the invention, the compound (a) of the formula
(I) in the composition of the present invention, is defined as a
compound of formula (I) wherein: X represents fluorine or chlorine,
Y represents CH or N, R.sup.1 represents hydrogen, and R.sup.2
represents hydrogen or hydroxy, or R.sup.1 and R.sup.2 together may
form C.dbd.O with the carbon atom to which they are bonding.
In another embodiment of the invention examples of the compound (a)
of the formula (I) in the composition of the present invention can
be those mentioned in the Table A mentioned below:
TABLE-US-00001 TABLE A Compound No. X Y R.sup.1 R.sup.2 1 F CH H OH
2 F N H OH 3 Cl CH H OH 4 Cl N H OH 5 Br CH H OH 6 Br N H OH 7 I CH
H OH 8 I N H OH 9 F CH H H 10 F N H H 11 Cl CH H H 12 Cl N H H 13
Br CH H H 14 Br N H H 15 I CH H H 16 I N H H 17 F CH C.dbd.O 18 F N
C.dbd.O 19 Cl CH C.dbd.O 20 Br CH C.dbd.O 21 Br N C.dbd.O 22 I CH
C.dbd.O 23 I N C.dbd.O
These compounds can be used individually or in combination of two
or more.
In the composition of the present invention, the herbicidal
compounds (b) used in combination with the compound (a) of the
above-mentioned formula (I) are as aforementioned, and in one
embodiment of the invention, examples can be (b-1) anilofos, (b-2)
pretilachlor, (b-3) cafenstrole, (b-4) cyhalofop-butyl, (b-5)
penoxsulam, (b-6) pyraclonil, (b-7) bispyribac-sodium, (b-8)
fentrazamide, (b-9) mefenacet, (b-10) oxaziclomefone, (b-11)
benfuresate, (b-12) bensulfuron-methyl, (b-13) ethoxysulfuron,
(b-14) bromobutide and (b-15) AVH301.
The above-mentioned herbicidal compounds (b) can be used,
individually or in combination of two or more, as a mixture with a
compound (a) of the formula (I).
The compounds (c) as safener used in combination with the compound
(a) of the above-mentioned formula (I) according to the present
invention are as aforementioned, and in one embodiment of the
invention examples can be (c-1) dymron, (c-2) mefenpyr-diethyl,
(c-3) isoxadifen and (c-4) isoxadifen-ethyl.
The above-mentioned compounds (c) as safener can be used,
individually or in combination of two kinds or more, as a mixture
with a compound (a) of the formula (I).
The above-mentioned herbicidal compounds (b) and the compounds (c)
as safener are described in, for example, The Pesticide Manual,
13.sup.th edition (published by British Crop Protection Council,
2003) or "Compendium of Pesticide Common Names"
(http://www.alanwood.net/pesticides). The compound having the code
number AVH 301 is a herbicide having the chemical name
2-{2-chloro-4-mesyl-3-[(tetrahydrofuran-2-ylmethoxy)-methyl]-benzoyl}-cyc-
lohexan-1,3-dione, also known under the common name
"tefuryltrione". The compound having the code number R-29148 is a
safener having the chemical name
3-(dichloroacetyl)-2,2,5-trimethyl-oxazolidine known from
DE-A-02350800 (U.S. Pat. No. 3,989,503).
In the composition of the present invention, the mixing ratio of a
compound (a) of the formula (I) and a herbicidal compound (b) can
be varied in a relatively wide range according to the kind,
application period, application place, application method, etc. of
said composition. Generally, at least one herbicidal compounds (b)
in the range of 0.05-200 parts by weight, (in another embodiment of
the invention, 0.1-100 parts by weight) can be used to 1 part by
weight of a compound (a) of the formula (I). Specifically, in one
embodiment of the invention for individual usage ratio of
herbicidal compounds (b) to 1 part by weight of a compound (a) of
the formula (I) there can be mentioned the following embodiments.
Anilofos (b-1): 0.5-50 parts by weight, or 1-20 parts by weight,
Pretilachlor (b-2): 0.5-50 parts by weight, or 1-20 parts by
weight, Cafenstrole (b-3): 0.5-50 parts by weight, or 1-20 parts by
weight, Cyhalofop-butyl (b-4): 0.3-30 parts by weight, or 0.5-10
parts by weight, Penoxsulam (b-5): 0.2-10 parts by weight, or 1-5
parts by weight, Pyraclonil (b-6): 0.5-50 parts by weight, or 1-20
parts by weight, Bispyribac-sodium (b-7): 0.1-10 parts by weight,
or 0.2-5 parts by weight, Fentrazamide (b-8): 0.5-50 parts by
weight, or 1-20 parts by weight, Mefenacet (b-9): 2-200 parts by
weight, or 5-50 parts by weight, Oxaziclomefone (b-10): 0.2-10
parts by weight, or 1-5 parts by weight, Benfuresate (b-11): 0.5-50
parts by weight, or 1-20 parts by weight, Bensulfuron-methyl
(b-12): 0.1-10 parts by weight, or 0.2-5 parts by weight,
Ethoxysulfuron (b-13): 0.1-10 parts by weight, or 0.2-5 parts by
weight, Bromobutide (b-14): 2-200 parts by weight, or 5-50 parts by
weight, AVH301 (b-15): 0.5-50 parts by weight, or 1-30 parts by
weight.
In the composition of the present invention, the mixing ratio of a
compound (a) of the formula (I) and a compound (c) as safener can
be varied in a relatively wide range according to the kind,
application period, application place, application method, etc. of
said composition. Generally, at least one compounds (c) as safener
in the range of 0.05-200 parts by weight, (in another embodiment of
the invention 0.2-100 parts by weight) can be used to 1 part by
weight of a compound (a) of the formula (I). Specifically, in one
embodiment of the invention for individual usage ratio of compounds
(c) to 1 part by weight of a compound (a) of the formula (I) there
can be mentioned the following. Dymron (c-1): 0.5-100 parts by
weight, or 1-20 parts by weight, Mefenpyr-diethyl (c-2): 0.05-10
parts by weight, or 0.5-5 parts by weight, Isoxadifen (c-3):
0.05-10 parts by weight, or 0.5-5 parts by weight, Isoxadifen-ethyl
(c-4): 0.05-10 parts by weight, or 0.5-5 parts by weight.
The composition of the present invention shows a strong controlling
effect against paddy field weeds and therefore said composition can
be used as a herbicide composition for paddy field, particularly a
selective herbicide for paddy rice.
An object of the invention is thus the use of a combination of
herbicide (a) and herbicide (b) or safener (c) or a combination of
components (a)+(b)+(c) for controlling weeds in a paddy field,
optionally in the presence of a crop of useful plants, particularly
rice plants. The components can be applied to the paddy field and
its weed plants in sequential manner or simultaneously. Another
object of the invention is thus the method wherein the components
(a), (b) and/or (c) are applied accordingly.
The composition of the present invention can be used against
various kinds of weeds developing in the paddy field. As their
examples there can be mentioned the following:
Dicotyledonous plants of the following Genera: Polygonum, Rorippa,
Rotala, Lindernia, Bidens, Dopatrium, Eclipta, Elatine, Gratiola,
Lindernia, Ludwigia, Oenanthe, Ranunculus, Deinostema, etc.
Monocotyledonous plants of the following Genera: Echinochloa,
Panicum, Poa, Cyperus, Monochoria, Fimbristylis, Sagittaria,
Eleocharis, Scirpus, Alisma, Aneilema, Blyxa, Eriocaulon,
Potamogeton, etc.
The composition of the present invention can be used, more
specifically for example, in relation to the following typical
paddy field weeds.
Dicotyledonous Plants
Rotala indica Koehne Lindernia procumbens Philcox Ludwigia
prostrata Roxburgh Potamogeton distinctus A. Benn Elatine triandra
Schk Oenanthe javanica Monocotyledonous Plants Echinochloa
oryzicola Vasing Monochoria vaginalis Presl Eleocharis acicularis
L. Eleocharis Kuroguwai Ohwi Cyperus difformis L. Cyperus serotinus
Rottboel Sagittaria pygmaea Miq Alisma canaliculatum A. Br. et
Bouche Scirpus juncoides Roxburgh
The use of the composition of the present invention, however,
should not be restricted to these weeds in any way, but can be
applied against other weeds in the same manner.
The composition of the present invention can be made into customary
formulation forms for control of paddy field weeds. As such
formulation forms there can be mentioned, for example, solutions,
emulsions, wettable powders, suspensions, powders, soluble powders,
granules, suspo-emulsion concentrates, solid formulations (jumbo
formulations), floating granules, microcapsules in polymer
substance, etc.
These formulations can be prepared according to per se known
methods. The formulations according to the present invention can be
prepared, for example, by mixing the aforementioned compound (a) of
the formula (I), herbicidal compound (b) and/or compound (c) with
extenders, namely liquid diluents and/or solid diluents, and, in
case of necessity, by using surfactants, namely emulsifiers and/or
dispersants and/or foam-forming agents.
In case of using water as extender, for example, organic solvents
can be used as auxiliary solvent. As liquid diluents there can be
mentioned, for example, organic solvents such as aromatic
hydrocarbons (for example, xylene, toluene, alkylnaphthalene,
etc.), chlorinated aromatic or chlorinated aliphatic hydrocarbons
(for example, chlorobenzenes, ethylene chlorides, methylene
chloride, etc.), aliphatic hydrocarbons (for example, cyclohexane
etc. or paraffins (for example, mineral oil fractions, mineral
oils, vegetable oils, etc.)), alcohols (for example, butanol,
glycols, etc. and their ethers, esters, etc.) ketones (for example,
acetone, methyl ethyl ketone, methyl isobutyl ketone,
cyclohexanone, etc.), strongly polar solvents (for example,
dimethylformamide, dimethyl sulfoxide, etc.), and water.
As solid diluents there can be mentioned, for example, ammonium
salts, ground natural minerals (for example, kaolin, clay, talc,
chalk, quartz, attapulgite, montmorillonite, diatomaceous earth,
etc.), ground synthetic minerals (for example, highly dispersed
silicic acid, alumina, silicates, etc.) etc. As solid carriers for
powders there can be used, for example, crushed and fractionated
rocks (for example, calcite, marble, pumice, sepiolite, dolomite,
etc.) synthetic granules of inorganic and organic meals, particles
of organic materials (for example, saw dust, coconut shells, maize
cobs, tobacco stalks, etc.) etc.
As emulsifiers and/or foaming agents there can be mentioned
nonionic or anionic emulsifiers (for example, polyoxyethylene fatty
acid esters, polyoxyethylene fatty alcohol ethers (for example,
alkylaryl polyglycol ethers, alkylsulfonates, alkylsulfates,
arylsulfonates, etc.)), albumin hydrolysis products, etc.
As dispersants, for example, lignin sulfite waste liquor, methyl
cellulose, etc. are adequate.
Tackifiers can also be used in formulations (powders, granules,
emulsifiable concentrates). As said tackifiers there can be
mentioned, for example, carboxymethyl cellulose, natural and
synthetic polymers (for example, gum Arabic, polyvinyl alcohol,
polyvinyl acetates, etc.) natural phospholipids (for example,
cephalins or recithins), synthetic phospholipids, etc. Further, as
additives, mineral oils and vegetable oils can be used.
Colorants can also be used. As said colorants there can be
mentioned inorganic pigments (for example, iron oxide, titanium
oxide, Prussian Blue, etc,), organic dyestuffs such as alizarin
dyestuffs, azo dyestuffs or metal phthalocyanine dyestuffs, and
further traces nutrients such as salts of iron, manganese, boron,
copper, cobalt, molybdenum or zinc.
The formulations can contain the total of the compound of the
formula (I) (a), herbicidal compound (b) and/or compound (c) at a
concentration in the range of generally 0.1-95% by weight (in
another embodiment of the invention 0.5-90% by weight).
The composition of the present invention can be used for
controlling weeds as themselves or in their formulation forms. It
is also possible to do tank mixing at the time of application and
further to contain other known active compounds, particularly
active compounds generally used in the paddy field, for example,
fungicides, insecticides, plant growth regulators, plant nutrients,
soil improving agents, etc.
The composition of the present invention can be used as such or in
their formulation forms or in application forms prepared by further
diluting said formulations, for example, in the forms of
ready-to-use solutions, emulsifiable concentrates, suspensions,
powders, wettable powders or granules. Formulations of these forms
can be applied to paddy field by usual methods, for example,
watering, spraying, atomizing, dusting, granule spreading, etc.
The composition of the present invention can be applied to the
paddy field before, at the time and after the transplantation. The
amount of said composition to be applied can be varied in a
substantial range. The amount can be in the range of, for example,
0.01-5 kg/ha (in another embodiment of the invention 0.06-4.5
kg/ha) as the total amount of the compound of the formula (I) (a),
herbicidal compound (b) and/or compound (c).
The invention is further described by the following non-limiting
examples which further illustrate the invention, and are not
intended, nor should they be interpreted to, limit the scope of the
invention.
BIOLOGICAL TEST EXAMPLES AND FORMULATION EXAMPLES
Test Compounds
Component (a) (a-1): compound No. 1 (ref: the aforementioned Table
A) (a-2): compound No. 3 (same as above) (a-3): compound No. 11
(same as above) Component (b) the aforementioned (b-1)-(b-15)
Component (c) the aforementioned (c-1)-(c-3) <Preparation of
Test Agents> Carrier: Acetone 5 parts by weight Surfactant:
Benzyloxy polyglycol ether 1 part by weight The above-mentioned
carrier and surfactant and 1 part by weight of active compounds
(component (a) and component (b) or component (c)) are mixed and
the obtained formulations are diluted with water to prepare the
test agents of the prescribed chemicals amount (preparations).
Test Example 1
Test of Effect of the Herbicide Composition Against Paddy Field
Weeds
<Test Method>
In a green house, seeds or tubers of Monochoria vaginalis Presl,
annual broad-leaves (Lindernia procumbens Philcox, Rotala indica
Koehne, Elatine triandra Schk, Ammannia multiflora Roxb., etc.),
Cyperus serotinus Rottboel, and Sagittaria pygmaea Miq were
inoculated to paddy field soil filled in a 500 cm.sup.2 pot and
brought to a submerged condition of about 2-3 cm. At 1.5-2
leafstage of each weed prescribed diluted solution of preparation
of each active compound and each herbicide in the following table
was applied on water surface each singly or simultaneously. After
the treatment, the submerged condition of 3 cm was maintained and
the herbicidal effect was studied 3 weeks after the treatment. The
herbicidal effect was evaluated as 100% in case of complete death
and 0% in case of no effect.
<Results>
Results are shown in Table 1-Table 3. In the tables, MOOVP
represents Monochoria vaginalis Presl, BBBBB represents annual
broad-leaves, CYPSE represents Cyperus serotinus Rottboel and SAGPY
represents Sagittaria pygmaea Miq.
TABLE-US-00002 TABLE 1 Amount of Active effective Herbicidal effect
(%) component component g/ha MOOVP BBBBB CYPSE SAGPY (a-1) 2.5 40
70 80 60 +(b-1) +200 90 100 90 70 +100 70 80 80 70 Single 200 10 0
0 10 100 10 0 0 10 +(b-2) +250 100 100 80 90 +125 70 90 80 80
Single 250 20 10 0 10 125 10 10 0 0 +(b-3) +150 100 100 100 90 +75
90 100 80 70 Single 150 60 50 70 10 75 50 40 0 10 +(b-4) +180 50 70
80 70 +90 40 70 70 60 Single 180 10 0 0 20 90 0 0 0 10 +(b-5) +100
90 90 100 80 +50 80 90 100 80 Single 100 90 90 70 85 50 75 50 70 65
+(b-6) +100 90 100 100 90 +50 90 100 100 80 Single 100 90 90 30 85
50 80 90 20 50 +(b-7) +5 70 90 100 80 +2.5 40 80 90 80 Single 5 10
10 60 30 2.5 0 10 20 0 +(b-8) +150 100 100 100 90 +75 90 85 100 80
Single 150 60 70 30 30 75 40 40 30 30 +(b-9) +600 100 90 100 80
+300 100 90 80 70 Single 600 80 40 30 10 300 65 30 30 10 +(b-10)
+40 80 90 100 80 +20 60 70 70 60 Single 40 20 40 0 10 20 10 40 0 0
+(b-11) +250 70 90 100 80 +125 60 80 100 50 Single 250 0 0 70 20
125 0 0 20 10 +(b-12) +5 70 100 100 95 +2.5 50 90 100 80 Single 5
60 60 40 50 2.5 30 50 40 50 +(b-13) +3 85 100 100 90 +1.5 80 85 90
75 Single 3 70 70 0 65 1.5 65 40 0 65 +(b-14) +400 90 80 90 70 +200
70 50 85 70 Single 400 95 30 60 10 200 30 20 40 10 +(b-15) +150 100
90 90 80 +75 100 80 80 80 Single 150 95 65 85 80 75 85 50 80 80
TABLE-US-00003 TABLE 2 Amount of Active effective Herbicidal effect
(%) component component g/ha MOOVP BBBBB CYPSE SAGPY (a-2) 2.5 30
60 75 60 +(b-1) +200 90 100 90 70 +100 60 70 70 60 Single 200 10 0
0 10 100 10 0 0 10 +(b-2) +250 95 95 70 90 +125 80 85 40 70 Single
250 20 10 0 10 125 10 10 0 0 +(b-3) +150 100 100 100 85 +75 90 90
70 80 Single 150 60 50 70 10 75 50 40 0 10 +(b-4) +180 60 70 95 80
+90 50 70 70 80 Single 180 10 0 0 20 90 0 0 0 10 +(b-5) +100 85 95
100 80 +50 85 90 95 70 Single 100 90 90 70 85 50 75 50 70 65 +(b-6)
+100 95 100 100 85 +50 90 100 70 80 Single 100 90 90 30 85 50 80 90
20 50 +(b-7) +5 60 85 100 80 +2.5 40 60 90 80 Single 5 10 10 60 30
2.5 0 10 20 0 +(b-8) +150 100 100 100 85 +75 90 85 95 85 Single 150
60 70 30 30 75 40 40 30 30 +(b-9) +600 100 90 100 70 +300 90 85 70
70 Single 600 80 40 30 10 300 65 30 30 10 +(b-10) +40 70 80 95 80
+20 40 60 70 70 Single 40 20 40 0 10 20 10 40 0 0 +(b-11) +250 80
90 100 70 +125 50 60 80 50 Single 250 0 0 70 20 125 0 0 20 10
+(b-12) +5 85 90 100 70 +2.5 50 80 100 70 Single 5 60 60 40 50 2.5
30 50 40 50 +(b-13) +3 85 80 100 80 +1.5 80 80 80 75 Single 3 70 70
0 65 1.5 65 40 0 65 +(b-14) +400 90 70 90 80 +200 40 50 90 60
Single 400 95 30 60 10 200 30 20 40 10 +(b-15) +150 90 85 90 80 +75
100 70 80 85 Single 150 95 65 85 80 75 85 50 80 80
TABLE-US-00004 TABLE 3 Amount of Active effective Herbicidal effect
(%) component component g/ha MOOVP BBBBB CYPSE SAGPY (a-3) 5.0 30
60 50 50 +(b-1) +200 70 80 90 70 +100 50 50 70 60 Single 200 10 0 0
10 100 10 0 0 10 +(b-2) +250 70 80 60 70 +125 50 75 40 60 Single
250 20 10 0 10 125 10 10 0 0 +(b-3) +150 90 90 100 70 +75 90 85 60
60 Single 150 60 50 70 10 75 50 40 0 10 +(b-4) +180 50 60 80 70 +90
30 60 60 70 Single 180 10 0 0 20 90 0 0 0 10 +(b-5) +100 80 95 90
90 +50 85 90 80 70 Single 100 90 90 70 85 50 75 50 70 65 +(b-6)
+100 100 100 80 100 +50 90 100 70 80 Single 100 90 90 30 85 50 80
90 20 50 +(b-7) +5 50 80 100 80 +2.5 30 75 80 70 Single 5 10 10 60
30 2.5 0 10 20 0 +(b-8) +150 90 90 80 80 +75 60 85 80 80 Single 150
60 70 30 30 75 40 40 30 30 +(b-9) +600 90 90 90 70 +300 80 85 80 60
Single 600 80 40 30 10 300 65 30 30 10 +(b-10) +40 70 80 80 70 +20
50 70 70 70 Single 40 20 40 0 10 20 10 40 0 0 +(b-11) +250 50 60 90
70 +125 40 60 70 70 Single 250 0 0 70 20 125 0 0 20 10 +(b-12) +5
80 95 90 85 +2.5 40 90 90 70 Single 5 60 60 40 50 2.5 30 50 40 50
+(b-13) +3 80 90 70 80 +1.5 80 90 50 80 Single 3 70 70 0 65 +1.5 65
40 0 65 +(b-14) +400 90 80 90 80 +200 60 60 70 70 Single 400 95 30
60 10 200 30 20 40 10 +(b-15) +150 90 100 90 90 +75 90 80 70 85
Single 150 95 65 85 80 75 85 50 80 80
Test Example 2
Test of Effect of Phytotoxicity Reduction
<Test Method>
In a green house, paddy rice of 2-2.5 leafstage was transplanted to
paddy field soil filled in a 1000 cm.sup.2 pot to 2 cm depth and
brought to a submerged condition of about 2-3 cm. Five days after
the transplantation, prescribed diluted solution of preparation of
each active compound and each herbicide in the following table was
applied on water surface each singly or simultaneously. After the
treatment, the submerged condition of 3 cm was maintained and the
grade of phytotoxicity to paddy rice was studied 2 weeks after the
treatment. The phytotoxicity was evaluated as 100% in case of
complete death and 0% in case of no phytotoxicity.
<Results>
Results are shown in Table 4.
TABLE-US-00005 TABLE 4 Amount of effective Active component
component (g/ha) Phytotoxicity % (a-1) 120 50 60 30 +(c-1) 120 +
450 30 60 + 450 20 +(c-2) 120 + 500 30 60 + 500 20 +(c-3) 120 + 500
45 60 + 500 20 (a-2) 120 40 60 20 +(c-1) 120 + 450 25 60 + 450 10
+(c-2) 120 + 500 25 60 + 500 10 +(c-3) 120 + 500 35 60 + 500 10
(a-3) 180 30 90 20 +(c-1) 180 + 450 10 90 + 450 0 +(c-2) 180 + 500
20 90 + 500 10 +(c-3) 180 + 500 25 90 + 500 10 (c-1) 450 0 (c-2)
500 0 (c-3) 500 0
Formulation Example 1
To a mixture of 3 parts by weight of the active compound (a-1), 4
parts by weight of the active compound (b-1), 32 parts by weight of
bentonite (montmorillonite), 58 parts by weight of talc and 3 parts
by weight of ligninsulfonate salt, 25 parts by weight of water were
added, well kneaded, made into granules of 10-40 mesh by an
extrusion granulator and dried at 40-50.degree. C. to obtain
granules.
Formulation Example 2
96 Parts by weight of clay mineral particles having particle
diameter distribution in the range of 0.2-2 mm are put in a rotary
mixer. While rotating it, 2 parts by weight of the active compound
(a-1) and 2 parts by weight of the active compound (b-2) are
sprayed together with a liquid diluent, wetted uniformly and dried
at 40-50.degree. C. to obtain granules.
Formulation Example 3
A mixture of 4 parts by weight of the active compound (a-1), 4
parts by weight of the active compound (b-3), 10 parts by weight of
ethylene glycol, 3 parts by weight of polyoxyalkylene
tristyrylphenyl ether, 10 parts by weight of xanthan gum, 0.5 parts
by weight of 14% silicone oil emulsion and 68.5 parts by weight of
water is well stirred and then crushed with a crusher (Dyno-Mill
Type KDL) to obtain water suspension formulation.
Formulation Example 4
5 Parts by weight of the active compound (a-1), 15 parts by weight
of the active compound (b-4), 30 parts by weight of sodium
ligninsulfonate, 15 parts by weight of parts bentonite and 35 parts
by weight of calcined diatomaceous earth powder are well mixed,
added with water, well kneaded, extruded with 0.3 mm screen and
dried to obtain water dispersible granules.
INDUSTRIAL APPLICABILITY
The herbicide composition for paddy field of the present invention
shows, as shown in the aforementioned test examples, precise
controlling effect against various kinds of paddy field weeds and
an excellent residual effect.
Having thus described in detail various embodiments of the present
invention, it is to be understood that the invention defined by the
above paragraphs is not to be limited to particular details set
forth in the above description as many apparent variations thereof
are possible without departing from the spirit or scope of the
present invention.
* * * * *
References